Spirometry with FVL measurement is a vital component of the patient evaluation for respiratory symptoms, and when a properly performed FVL test is abnormal it should prompt a thorough investigation.

When interviewing a patient, a careful history may give some clues as to the correct diagnosis. Patients may point to their larynx when asked where they feel the site of air flow limitation exists, ...

This application note provides an introduction to spirometers and their basic functions. It discusses both laboratory units and portable devices for point-of-care testing, and offers guidance on ...